tests: alphabetize and group Python imports & add check

- De-duplicates, groups, and sorts imports based on the provided `isort` settings.

tests/http/testenv/__init__.py

@@ -25,16 +25,19 @@
 ###########################################################################
 # ruff: noqa: F401, E402
 import pytest
+
 pytest.register_assert_rewrite("testenv.env", "testenv.curl", "testenv.caddy",
                                "testenv.httpd", "testenv.nghttpx")
 
-from .env import Env
-from .certs import TestCA, Credentials
+# This import must be first to avoid circular imports
+from .curl import CurlClient, ExecResult, RunProfile  # noqa: I001
+
 from .caddy import Caddy
-from .httpd import Httpd
-from .curl import CurlClient, ExecResult, RunProfile
+from .certs import Credentials, TestCA
 from .client import LocalClient
-from .nghttpx import Nghttpx, NghttpxQuic, NghttpxFwd
-from .vsftpd import VsFTPD
 from .dante import Dante
+from .env import Env
+from .httpd import Httpd
+from .nghttpx import Nghttpx, NghttpxFwd, NghttpxQuic
 from .sshd import Sshd
+from .vsftpd import VsFTPD

tests/http/testenv/caddy.py

@@ -29,7 +29,7 @@ import os
 import socket
 import subprocess
 import time
-from datetime import timedelta, datetime
+from datetime import datetime, timedelta
 from json import JSONEncoder
 from typing import Dict
 

tests/http/testenv/certs.py

@@ -30,8 +30,8 @@ import os
 import re
 import shutil
 import subprocess
-from datetime import timedelta, datetime, timezone
-from typing import List, Any, Optional
+from datetime import datetime, timedelta, timezone
+from typing import Any, List, Optional
 
 from cryptography import x509
 from cryptography.hazmat.backends import default_backend
@@ -40,10 +40,14 @@ from cryptography.hazmat.primitives._serialization import PublicFormat
 from cryptography.hazmat.primitives.asymmetric import ec, rsa
 from cryptography.hazmat.primitives.asymmetric.ec import EllipticCurvePrivateKey
 from cryptography.hazmat.primitives.asymmetric.rsa import RSAPrivateKey
-from cryptography.hazmat.primitives.serialization import Encoding, PrivateFormat, NoEncryption, load_pem_private_key
+from cryptography.hazmat.primitives.serialization import (
+    Encoding,
+    NoEncryption,
+    PrivateFormat,
+    load_pem_private_key,
+)
 from cryptography.x509 import ExtendedKeyUsageOID, NameOID
 
-
 EC_SUPPORTED = {}
 EC_SUPPORTED.update([(curve.name.upper(), curve) for curve in [
     ec.SECP192R1,

tests/http/testenv/client.py

@@ -29,12 +29,11 @@ import os
 import shutil
 import subprocess
 from datetime import datetime
-from typing import Optional, Dict
+from typing import Dict, Optional
 
 from . import ExecResult
 from .env import Env
 
-
 log = logging.getLogger(__name__)
 
 

tests/http/testenv/curl.py

@@ -27,22 +27,21 @@
 import json
 import logging
 import os
-import sys
-import time
-from functools import cmp_to_key
-from threading import Thread
-
-import psutil
 import re
 import shutil
 import subprocess
-from statistics import mean, fmean
-from datetime import timedelta, datetime, timezone
-from typing import List, Optional, Dict, Union, Any
+import sys
+import time
+from datetime import datetime, timedelta, timezone
+from functools import cmp_to_key
+from statistics import fmean, mean
+from threading import Thread
+from typing import Any, Dict, List, Optional, Union
 from urllib.parse import urlparse
 
-from .env import Env
+import psutil
 
+from .env import Env
 
 log = logging.getLogger(__name__)
 

tests/http/testenv/dante.py

@@ -29,8 +29,7 @@ import os
 import socket
 import subprocess
 import time
-from datetime import timedelta, datetime
-
+from datetime import datetime, timedelta
 from typing import Dict
 
 from . import CurlClient

tests/http/testenv/env.py

@@ -33,14 +33,13 @@ import subprocess
 import tempfile
 from configparser import ConfigParser, ExtendedInterpolation
 from datetime import timedelta
-from typing import Optional, Dict, List
+from typing import Dict, List, Optional
 
 import pytest
 from filelock import FileLock
 
 from .certs import CertificateSpec, Credentials, TestCA
 
-
 log = logging.getLogger(__name__)
 
 

tests/http/testenv/httpd.py

@@ -24,17 +24,17 @@
 #
 ###########################################################################
 #
+import copy
 import inspect
 import logging
 import os
 import shutil
 import socket
 import subprocess
-from datetime import timedelta, datetime
-from json import JSONEncoder
 import time
-from typing import List, Union, Optional, Dict
-import copy
+from datetime import datetime, timedelta
+from json import JSONEncoder
+from typing import Dict, List, Optional, Union
 
 from .curl import CurlClient, ExecResult
 from .env import Env

tests/http/testenv/nghttpx.py

@@ -30,11 +30,11 @@ import signal
 import socket
 import subprocess
 import time
-from typing import Optional, Dict
 from datetime import datetime, timedelta
+from typing import Dict, Optional
 
-from .env import Env, NghttpxUtil
 from .curl import CurlClient
+from .env import Env, NghttpxUtil
 from .ports import alloc_ports_and_do
 
 log = logging.getLogger(__name__)

tests/http/testenv/sshd.py

@@ -30,8 +30,7 @@ import socket
 import stat
 import subprocess
 import time
-from datetime import timedelta, datetime
-
+from datetime import datetime, timedelta
 from typing import Dict
 
 from . import CurlClient

tests/http/testenv/vsftpd.py

@@ -30,9 +30,8 @@ import re
 import socket
 import subprocess
 import time
-
 from datetime import datetime, timedelta
-from typing import List, Dict
+from typing import Dict, List
 
 from .curl import CurlClient, ExecResult
 from .env import Env